Solid stick antiperspirant compositions

Abstract

A method of manufacturing a packaged solid stick antiperspirant composition is provided. The method includes combining an antiperspirant active, one or more structurants and a surfactant to form a mixture, dispensing the mixture from a nozzle to fill a dispensing package, forming a solid stick antiperspirant composition within the dispensing package. The surfactant has a melt temperature that is greater than the crystallization onset temperature of the solid stick antiperspirant composition. The antiperspirant active and the surfactant are in contact for about 5 minutes or less from the moment that the antiperspirant active and the surfactant and the structurant are mixed until the moment that the mixture is dispensed from the nozzle.

What is claimed is: 
     
       1. A solid stick antiperspirant composition, comprising:
 an antiperspirant active comprising a zirconium salt, wherein the solid stick antiperspirant composition is substantially or completely free of aluminum zirconium tetrachlorohydrate glycine having a metal to chloride ratio from 1.2 to 1.3; 
 a structurant comprising stearyl alcohol; 
 a surfactant, wherein the surfactant has a melt temperature that is greater than the crystallization onset temperature of the solid stick antiperspirant composition; 
 wherein the solid stick antiperspirant composition is a single phase; and 
 wherein the contact time between the surfactant and active while mixed is less than 5 minutes. 
 
     
     
       2. A solid stick antiperspirant composition according to  claim 1 , wherein the antiperspirant active has a hygroscopicity greater than 30% at 86% relative humidity after 5 days and a metal to chloride ratio less than 1.5. 
     
     
       3. A solid stick antiperspirant composition according to  claim 1 , wherein the antiperspirant active has a hygroscopicity greater than 30% at 86% relative humidity after 5 days and a metal to chloride ratio greater than 1.3. 
     
     
       4. A solid stick antiperspirant composition according to  claim 3 , wherein the antiperspirant active is aluminum zirconium pentachlorohydrate glycine or aluminum zirconium pentachlorohydrex. 
     
     
       5. A solid stick antiperspirant composition according to  claim 1 , wherein the surfactant is a non-ionic ethoxylated linear alcohol having a carbon chain length from about 20 to about 40. 
     
     
       6. A solid stick antiperspirant composition according to  claim 1 , wherein the surfactant has an HLB value between about 6 and about 12. 
     
     
       7. A solid stick antiperspirant composition according to  claim 1 , wherein the surfactant has a melt temperature from 70° C. to 120° C. 
     
     
       8. A solid stick antiperspirant composition according to  claim 1 , wherein the surfactant has a concentration from about 1% to about 4% by weight of the solid stick antiperspirant composition. 
     
     
       9. A solid stick antiperspirant composition according to  claim 1 , wherein the structurant further comprises at least one material selected from the group consisting of hydrogenated castor wax, ozokerite, behenyl alcohol, polyethylene, polymethylene, and a triglyceride. 
     
     
       10. A solid stick antiperspirant composition according to  claim 1 , wherein the solid stick antiperspirant composition has a Red Dot Color Value of 0.5 or less at 4, 5, 10 and 15 minutes and a Red Dot Color Value greater than 1 at 30 seconds. 
     
     
       11. A solid stick antiperspirant composition according to  claim 1 , wherein the solid stick antiperspirant composition is anhydrous. 
     
     
       12. A solid stick antiperspirant composition according to  claim 1 , wherein the antiperspirant active has a concentration from 12% to 35% by weight of the solid stick antiperspirant composition. 
     
     
       13. A solid stick antiperspirant composition according to  claim 1 , wherein the solid stick antiperspirant composition has a hardness greater than 600 gram force. 
     
     
       14. A solid stick antiperspirant composition, comprising:
 aluminum zirconium pentachlorohydrate glycine or aluminum zirconium pentachlorohydrex; 
 one or more structurants; 
 a surfactant, wherein the surfactant has a melt temperature that is greater than the crystallization onset temperature of the solid stick antiperspirant composition; 
 wherein the solid stick antiperspirant composition is a single phase; and 
 wherein the contact time between the surfactant and active while mixed is less than 5 minutes. 
 
     
     
       15. A solid stick antiperspirant composition, comprising:
 an antiperspirant active comprising a zirconium salt, wherein the antiperspirant active has a metal to chloride ratio greater than 1.4; 
 one or more structurants; 
 a surfactant, wherein the surfactant has a melt temperature that is greater than the crystallization onset temperature of the solid stick antiperspirant composition; 
 wherein the solid stick antiperspirant composition is a single phase; and 
 wherein the contact time between the surfactant and active while mixed is less than 5 minutes.